CVE-2026-12900

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreMEDIUM confidence

Score 6.4 from GitHub Security Advisory published 2026-07-21. a secondary CVSS source baseline 6.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The Spectra Gutenberg Blocks – Website Builder for the Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the uagb/image block in all versions up to, and including, 2.19.28 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVSS v3
6.4
EG Score
6.4(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity64% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 22, 2026

References (3)

Vendor Advisories for CVE-2026-12900(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 75× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 102 total refreshes for this CVE.

  1. 2026-08-30 02:29 UTCEG score recompute
  2. 2026-08-30 02:28 UTCGHSA enrichment
  3. 2026-08-30 01:21 UTCEPSS rescore
  4. 2026-08-28 21:40 UTCEPSS rescore
  5. 2026-08-27 23:46 UTCEG score recompute
  6. 2026-08-27 23:46 UTCGHSA enrichment
  7. 2026-08-27 14:24 UTCEPSS rescore
  8. 2026-08-26 21:41 UTCEG score recompute
  9. 2026-08-26 21:41 UTCGHSA enrichment
  10. 2026-08-25 14:48 UTCEG score recompute
  11. 2026-08-25 14:48 UTCGHSA enrichment
  12. 2026-08-25 13:48 UTCEPSS rescore
  13. 2026-08-24 12:59 UTCEG score recompute
  14. 2026-08-24 12:59 UTCGHSA enrichment
  15. 2026-08-23 11:08 UTCEG score recompute
  16. 2026-08-23 11:08 UTCGHSA enrichment
  17. 2026-08-23 00:19 UTCEPSS rescore
  18. 2026-08-22 09:19 UTCEG score recompute
  19. 2026-08-22 09:19 UTCGHSA enrichment
  20. 2026-08-21 23:48 UTCEPSS rescore
  21. 2026-08-21 07:30 UTCEG score recompute
  22. 2026-08-21 07:30 UTCGHSA enrichment
  23. 2026-08-20 22:55 UTCEPSS rescore
  24. 2026-08-20 05:41 UTCEG score recompute
  25. 2026-08-20 05:41 UTCGHSA enrichment
Show 75 more
  1. 2026-08-19 17:03 UTCEPSS rescore
  2. 2026-08-19 03:51 UTCGHSA enrichment
  3. 2026-08-18 02:01 UTCEG score recompute
  4. 2026-08-18 02:01 UTCGHSA enrichment
  5. 2026-08-17 00:08 UTCEG score recompute
  6. 2026-08-17 00:08 UTCGHSA enrichment
  7. 2026-08-16 14:56 UTCEPSS rescore
  8. 2026-08-16 02:14 UTCEPSS rescore
  9. 2026-08-15 22:19 UTCEG score recompute
  10. 2026-08-15 22:19 UTCGHSA enrichment
  11. 2026-08-15 01:30 UTCEPSS rescore
  12. 2026-08-14 20:30 UTCEG score recompute
  13. 2026-08-14 20:30 UTCGHSA enrichment
  14. 2026-08-13 22:00 UTCEPSS rescore
  15. 2026-08-13 18:40 UTCGHSA enrichment
  16. 2026-08-12 16:51 UTCEG score recompute
  17. 2026-08-12 16:51 UTCGHSA enrichment
  18. 2026-08-12 13:50 UTCEPSS rescore
  19. 2026-08-11 15:02 UTCEG score recompute
  20. 2026-08-11 15:02 UTCGHSA enrichment
  21. 2026-08-11 13:42 UTCEPSS rescore
  22. 2026-08-10 23:59 UTCEPSS rescore
  23. 2026-08-10 13:13 UTCEG score recompute
  24. 2026-08-10 13:13 UTCGHSA enrichment
  25. 2026-08-09 13:46 UTCEPSS rescore
  26. 2026-08-09 11:24 UTCEG score recompute
  27. 2026-08-09 11:24 UTCGHSA enrichment
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-08 09:34 UTCEG score recompute
  30. 2026-08-08 09:34 UTCGHSA enrichment
  31. 2026-08-07 07:45 UTCEG score recompute
  32. 2026-08-07 07:45 UTCGHSA enrichment
  33. 2026-08-06 13:46 UTCEPSS rescore
  34. 2026-08-06 05:56 UTCEG score recompute
  35. 2026-08-06 05:56 UTCGHSA enrichment
  36. 2026-08-05 19:17 UTCEPSS rescore
  37. 2026-08-05 04:07 UTCEG score recompute
  38. 2026-08-05 04:06 UTCGHSA enrichment
  39. 2026-08-04 15:09 UTCEPSS rescore
  40. 2026-08-04 10:38 UTCEPSS rescore
  41. 2026-08-04 02:16 UTCEG score recompute
  42. 2026-08-04 02:16 UTCGHSA enrichment
  43. 2026-08-03 10:35 UTCEPSS rescore
  44. 2026-08-03 00:27 UTCEG score recompute
  45. 2026-08-03 00:27 UTCGHSA enrichment
  46. 2026-08-02 02:26 UTCEPSS rescore
  47. 2026-08-01 22:37 UTCEG score recompute
  48. 2026-08-01 22:37 UTCGHSA enrichment
  49. 2026-08-01 04:15 UTCEPSS rescore
  50. 2026-07-31 20:47 UTCGHSA enrichment
  51. 2026-07-30 18:57 UTCEG score recompute
  52. 2026-07-30 18:57 UTCGHSA enrichment
  53. 2026-07-30 16:27 UTCEPSS rescore
  54. 2026-07-30 01:30 UTCEPSS rescore
  55. 2026-07-29 16:15 UTCEG score recompute
  56. 2026-07-29 16:15 UTCGHSA enrichment
  57. 2026-07-28 15:36 UTCEPSS rescore
  58. 2026-07-28 14:26 UTCEG score recompute
  59. 2026-07-28 14:26 UTCGHSA enrichment
  60. 2026-07-27 14:13 UTCEPSS rescore
  61. 2026-07-27 12:35 UTCEG score recompute
  62. 2026-07-27 12:35 UTCGHSA enrichment
  63. 2026-07-26 14:54 UTCEPSS rescore
  64. 2026-07-26 14:54 UTCEPSS rescore
  65. 2026-07-26 10:45 UTCEG score recompute
  66. 2026-07-26 10:45 UTCGHSA enrichment
  67. 2026-07-25 14:17 UTCEPSS rescore
  68. 2026-07-24 14:17 UTCEPSS rescore
  69. 2026-07-23 14:18 UTCEPSS rescore
  70. 2026-07-23 03:05 UTCEG score recompute
  71. 2026-07-22 23:27 UTCEG score recompute
  72. 2026-07-22 23:27 UTCGHSA enrichment
  73. 2026-07-22 14:08 UTCEPSS rescore
  74. 2026-07-21 15:24 UTCEPSS rescore
  75. 2026-07-20 22:42 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-12900?
CVE-2026-12900 is a medium vulnerability published on July 20, 2026. The Spectra Gutenberg Blocks – Website Builder for the Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the uagb/image block in all versions up to, and including, 2.19.28 due to insufficient input sanitization and output escaping. This makes it possible for…
When was CVE-2026-12900 disclosed?
CVE-2026-12900 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12900 actively exploited?
CVE-2026-12900 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.6% of all scored CVEs.
What is the CVSS score of CVE-2026-12900?
CVE-2026-12900 has a CVSS v3 base score of 6.4 (NVD).
How do I remediate CVE-2026-12900?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12900, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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